The Speed-Chute is a two piece combination mainspring housing with cut checkering (20x30 LPI) and oversized magazine guide. Its interlocking design provides a rock solid magazine guide without the gaps and rattling sometimes associated with competitive products. If you need to remove the magazine funnel for concealed carry, simply remove the mainspring housing pin, separate the funnel from the mainspring housing, and reinstall the pin. It's that easy! The Speed-Chute is fully machined from bar stock steel for the best quality possible. Fits all standard 1911 style frames.